Journal of the European Optical Society-Rapid Publications最新文献

{"title":"Binary defocusing technique based on complementary decoding with unconstrained dual projectors","authors":"Xuexing Li,&nbsp;Wenhui Zhang","doi":"10.1186/s41476-021-00159-6","DOIUrl":"https://doi.org/10.1186/s41476-021-00159-6","url":null,"abstract":"<p>Binary defocusing technique can effectively break the limitation of hardware speed, which has been widely used in the real-time three-dimensional (3D) reconstruction. In addition, fusion technique can reduce captured images count for a 3D scene, which helps to improve real-time performance. Unfortunately, it is difficult for binary defocusing technique and fusion technique working simultaneously. To this end, our research established a novel system framework consisting of dual projectors and a camera, where the position and posture of the dual projectors are not strictly required. And, the dual projectors can adjust defocusing level independently. Based on this, this paper proposed a complementary decoding method with unconstrained dual projectors. The core idea is that low-resolution information is employed for high-resolution phase unwrapping. For this purpose, we developed the low-resolution depth extraction strategy based on periodic space-time coding patterns and the method from the low-resolution order to high-resolution order of fringe. Finally, experimental results demonstrated the performance of our proposed method, and the proposed method only requires three images for a 3D scene, as well as has strong robustness, expansibility, and implementation.</p>","PeriodicalId":674,"journal":{"name":"Journal of the European Optical Society-Rapid Publications","volume":"17 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4423611","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessment about Luneberg integrals and application to digital in-line holography","authors":"S. Coëtmellec,&nbsp;D. Lebrun,&nbsp;M. Brunel,&nbsp;A. J. E. M. Janssen","doi":"10.1186/s41476-021-00154-x","DOIUrl":"https://doi.org/10.1186/s41476-021-00154-x","url":null,"abstract":"<p>In this publication, the Luneberg integrals are revisited and the conditions of the using of such integrals have been recalled. Additivity law of Luneberg’s integrals and the link with the Frenel kernel for the propagation are discussed. By means of the definition of the Luneberg’s integrals, the propagation of a vectorial electromagnetic field (Hertz potentials) is developed and a new approach of the computation have been proposed based on Zernike polynomials. With this new approach simulations of holograms is illustrated in the case of the digital in-line holography with an opaque disk.</p>","PeriodicalId":674,"journal":{"name":"Journal of the European Optical Society-Rapid Publications","volume":"17 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1186/s41476-021-00154-x","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5153079","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Design of a phosphor-converted LED based lighting system considering both the lighting and color uniformity","authors":"Jinren Yan","doi":"10.1186/s41476-021-00158-7","DOIUrl":"https://doi.org/10.1186/s41476-021-00158-7","url":null,"abstract":"<p>In this work, a scheme of combining an aspheric reflector and a primary packaging freeform lens in phosphor-converted lighting-emitting diode (pc-LED) based lighting system design was developed. In contrast to most of previous works in which the color and illumination uniformity of the pc-LED lighting systems were improved one by one, the developed scheme can improve both indicators simultaneously. To demonstrate the feasibility of the developed design scheme, an initially designed pc-LED optical model, with an average correlated color temperature (CCT) of about 5000?K, was constructed as the light source of the illumination system. The key ingredient to the color uniformity of the illumination system was investigated at first, and then several instances with the cut-off angle ranging from 40 to 60 degrees were further discussed. Detailed analysis shows: for each case, the CCT variation decreases from over 4000?K to smaller than 300?K and the illumination uniformity increases from a very low level to better than 80% on the target region.</p>","PeriodicalId":674,"journal":{"name":"Journal of the European Optical Society-Rapid Publications","volume":"17 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1186/s41476-021-00158-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5159368","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Metamaterials subwavelength terahertz resonant cavities","authors":"M. Al-Rubaiee,&nbsp;A. H. Al-Janabi,&nbsp;S. C. Fleming,&nbsp;A. Argyros","doi":"10.1186/s41476-021-00157-8","DOIUrl":"https://doi.org/10.1186/s41476-021-00157-8","url":null,"abstract":"<p>One of the unique properties of metamaterials is the ability to manipulate electromagnetic waves at subwavelength scales, made possible by their structure on these scales. Here, rather than consider effective bulk properties, we consider the properties of microscopic features based on considering resonant unit cells. We used wire array metamaterials to form localized resonant cavities by changing the resonance frequency of one or more unit cells, surrounded by unchanged unit cells that do not support resonance for the propagating mode (i.e. forming a band gap). We validate our approach experimentally with electromagnetic waves in the terahertz range, demonstrating and characterizing subwavelength resonant cavities in this range. These resonant cavities can pave the way for ultra-compact subwavelength waveguides and other optical components.</p>","PeriodicalId":674,"journal":{"name":"Journal of the European Optical Society-Rapid Publications","volume":"17 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1186/s41476-021-00157-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4941719","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Stimulated Raman scattering simulation for imaging optimization","authors":"Liron Zada,&nbsp;Bart Fokker,&nbsp;Heather A. Leslie,&nbsp;A. Dick Vethaak,&nbsp;Johannes F. de Boer,&nbsp;Freek Ariese","doi":"10.1186/s41476-021-00155-w","DOIUrl":"https://doi.org/10.1186/s41476-021-00155-w","url":null,"abstract":"<p>Two simulation programs of a stimulated Raman scattering microscopy (SRS) imaging system with lock-in amplifier (LIA) detection were developed. SRS is an imaging technique based on the vibrational Raman cross-section as the contrast mechanism and enables fast, label-free imaging. Most SRS implementations are based on LIA detection of a modulated signal. However, building and operating such SRS set-ups still poses a challenge when selecting the LIA parameter settings for optimized acquisition speed or image quality. Moreover, the type of sample, e.g. a sparse sample vs. a densely packed sample, the required resolution as well as the Raman cross-section and the laser powers affect the parameter choice.</p><p>A simulation program was used to find these optimal parameters. The focal spot diameters of the individual lasers (pump and Stokes) were used to estimate the effective SRS signal focal spot and the (optical) spatial resolution. By calibrating the signal and noise propagation through an SRS system for a known molecule, we estimated the signal and noise input to the LIA. We used a low pass filter model to simulate the LIA behavior in order to find the optimal parameters (i.e. filter order and time constant).</p><p>Optimization was done for either image quality (expressed as contrast to noise ratio) or acquisition time. The targeted object size was first determined as a measure for the required resolution. The simulation output consisted of the LIA parameters, pixel dwell time and contrast to noise ratio.</p><p>In a second simulation we evaluated SRS imaging based on the same principles as the optimal setting simulation, i.e. the signals were propagated through an imaging system and LIA detection. The simulated images were compared to experimental SRS images of polystyrene beads.</p><p>Finally, the same software was used to simulate multiplexed SRS imaging. In this study we modeled a six-channel frequency-encoded multiplexed SRS system demodulated with six LIA channels. We evaluated the inter-channel crosstalk as a function of chosen LIA parameters, which in multiplex SRS imaging also needs to be considered.</p><p>These programs to optimize the contrast to noise ratio, acquisition speed, resolution and crosstalk will be useful for operating stimulated Raman scattering imaging setup, as well as for designing novel setups.</p>","PeriodicalId":674,"journal":{"name":"Journal of the European Optical Society-Rapid Publications","volume":"17 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1186/s41476-021-00155-w","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4941720","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Quantum dash multi-wavelength lasers for Tbit/s coherent communications and 5G wireless networks","authors":"Zhenguo Lu,&nbsp;Jiaren Liu,&nbsp;Youxin Mao,&nbsp;Khan Zeb,&nbsp;Guocheng Liu,&nbsp;Philip J. Poole,&nbsp;John Weber,&nbsp;Mohamed Rahim,&nbsp;Grzegorz Pakulski,&nbsp;Chunying Song,&nbsp;Martin Vachon,&nbsp;Pedro Barrios,&nbsp;Daniel Poitras,&nbsp;Shurui Wang,&nbsp;Weihong Jiang","doi":"10.1186/s41476-021-00156-9","DOIUrl":"https://doi.org/10.1186/s41476-021-00156-9","url":null,"abstract":"<p>We report on the design, growth, fabrication, and performance of InAs/InP quantum dash (QD) multi-wavelength lasers (MWLs) developed by the National Research Council (NRC) Canada. The key technical specifications investigated include optical and RF beating spectra, relative intensity noise (RIN), and optical phase noise of each individual wavelength channel. Data bandwidth transmission capacity of 5.376 Tbit/s and 10.8 Tbit/s respectively in the PAM-4 and 16-QAM modulation formats are demonstrated using only a single C-band QD 34.2-GHz MWL chip. We have also developed a monolithic InAs/InP QD dual-wavelength (DW) DFB laser as a compact optical beat source to generate millimeter-wave (MMW) signals. Due to the common cavity, highly coherent and correlated optical modes with optical linewidth as low as 15.83?kHz, spectrally pure MMW signals around 46.8?GHz with a linewidth down to 26.1?kHz were experimentally demonstrated. By using this QD DW-DFB laser, a one GBaud (2 Gbps) MMW over-fiber transmission link is demonstrated with PAM-4 signals. The results show that the demonstrated device is suitable for high speed high capacity MMW fiber-wireless integrated fronthaul of 5G networks.</p>","PeriodicalId":674,"journal":{"name":"Journal of the European Optical Society-Rapid Publications","volume":"17 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1186/s41476-021-00156-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4545910","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A new route for caesium lead halide perovskite deposition","authors":"Naomi Falsini,&nbsp;Andrea Ristori,&nbsp;Francesco Biccari,&nbsp;Nicola Calisi,&nbsp;Giammarco Roini,&nbsp;Paolo Scardi,&nbsp;Stefano Caporali,&nbsp;Anna Vinattieri","doi":"10.1186/s41476-021-00153-y","DOIUrl":"https://doi.org/10.1186/s41476-021-00153-y","url":null,"abstract":"<p>Inorganic metal halide perovskites are relevant semiconductors for optoelectronic devices. The successful deposition of thin films of CsPbBr₃ and CsPbCl₃ has recently been obtained by Radio-Frequency magnetron sputtering. In this work we compare the morphological, structural and optical characteristics of the two materials obtained with this deposition technique. A detailed photoluminescence (PL) spectroscopy study of the as-grown samples was conducted at the macro and micro scale in a wide temperature range (10-300 K) to fully characterize the PL on sample areas of square centimeters, to assess the origin of the inhomogeneous broadening and to quantify the PL quantum yield quenching. Our results prove that this technique allows for the realization of high quality nanometric films with controlled thickness of relevance for optoelectronic applications.</p>","PeriodicalId":674,"journal":{"name":"Journal of the European Optical Society-Rapid Publications","volume":"17 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1186/s41476-021-00153-y","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4088319","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Raman spectroscopic detection of interleukin-10 and angiotensin converting enzyme","authors":"Shuo Zhang,&nbsp;Frederieke A. M. van der Mee,&nbsp;Roel J. Erckens,&nbsp;Carroll A. B. Webers,&nbsp;Tos T. J. M. Berendschot","doi":"10.1186/s41476-021-00152-z","DOIUrl":"https://doi.org/10.1186/s41476-021-00152-z","url":null,"abstract":"<p>In this report we present a confocal Raman system to identify the unique spectral features of two proteins, Interleukin-10 and Angiotensin Converting Enzyme. Characteristic Raman spectra were successfully acquired and identified for the first time to our knowledge, showing the potential of Raman spectroscopy as a non-invasive investigation tool for biomedical applications.</p>","PeriodicalId":674,"journal":{"name":"Journal of the European Optical Society-Rapid Publications","volume":"17 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1186/s41476-021-00152-z","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4779305","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fabrication of perfect plasmonic absorbers for blue and near-ultraviolet lights using double-layer wire-grid structures","authors":"Atsushi Motogaito,&nbsp;Ryoga Tanaka,&nbsp;Kazumasa Hiramatsu","doi":"10.1186/s41476-021-00151-0","DOIUrl":"https://doi.org/10.1186/s41476-021-00151-0","url":null,"abstract":"<p>This study proposes using double-layer wire-grid structures to create narrow-band, perfect plasmonic absorbers, which depend on polarization, for the short-wavelength visible and near-ultraviolet regions of the electromagnetic spectrum. A rigorous coupled-wave analysis reveals that the maximum absorption attained using Ag and Al is ~?90% at 450 and 375?nm. Experiments using Ag yielded results similar to those predicted by simulations. These results demonstrate that narrow-band perfect plasmonic absorbers, which depend on the polarization, can be realized at 450 and 375?nm using Ag or Al.</p>","PeriodicalId":674,"journal":{"name":"Journal of the European Optical Society-Rapid Publications","volume":"17 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1186/s41476-021-00151-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4779306","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Transient dynamical-thermal-optical system modeling and simulation","authors":"Luzia Hahn,&nbsp;Peter Eberhard","doi":"10.1186/s41476-021-00150-1","DOIUrl":"https://doi.org/10.1186/s41476-021-00150-1","url":null,"abstract":"<p>In modern high resolution optical systems like astronomical telescopes or lithographic objectives, performance degradations can be caused by various disturbances. Holistic optical system simulation is required to predict the performance or the high precision systems. In this paper a method for transient dynamical-thermal-optical system modeling and simulation is introduced. Thereby, elastic deformation, rigid body motion, and mechanical stresses due to dynamical excitation are calculated using elastic multibody system simulation and temperature changes are determined using thermal finite element analysis. The deformation, the motion, and the mechanically and thermally induced stress index changes are then considered in a gradient-index ray tracing. Finally, the presented method is applied in a dynamical-thermal single lens system.</p>","PeriodicalId":674,"journal":{"name":"Journal of the European Optical Society-Rapid Publications","volume":"17 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1186/s41476-021-00150-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4237711","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}